Abstract
Bioremediation of di- n-butyl phthalate (DnBP) in soil was studied with various concentrations in a bioslurry phase batch reactor operated in sequenting batch mode (bioaugmented with effluent treatment plant (ETP) microflora) for a total cycle period of 96 h. Process performance during the reactor operation was assessed by monitoring DnBP concentration and biochemical process parameters viz., pH, dissolved oxygen (DO), colony forming units (CFU) and oxygen uptake rate (OUR), during the sequence phase operation. The degradation rate was observed to be rapid at lower substrate concentrations and found to be slow as the substrate concentration increased. The potent bacterial strain was also isolated from the slurry phase reactor. Metabolites formed during the degradation of DnBP in the slurry phase reactor were identified. Studies on the kinetics and half-life of the reaction revealed that the degradation process followed zero-order kinetic model.
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